How does SAFe reliably identify "low performers"? Top companies tend not to do SAFe, I don't see the issue this solves. But I'd easily see SAFe creating low performers.
And let's be honest, SAFe is not for "I can attract talented people who can self-manage" companies. It's for "75% of my developers are scraping the bottom of the barrel, but I take what I can get because my company isn't sexy."